CN102205397B - Method for casting super-large type semi-gear ring - Google Patents
Method for casting super-large type semi-gear ring Download PDFInfo
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- CN102205397B CN102205397B CN 201110124006 CN201110124006A CN102205397B CN 102205397 B CN102205397 B CN 102205397B CN 201110124006 CN201110124006 CN 201110124006 CN 201110124006 A CN201110124006 A CN 201110124006A CN 102205397 B CN102205397 B CN 102205397B
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- ring gear
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- riser
- outer rim
- ring
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Abstract
The invention discloses a method for casting a super-large type semi-gear ring. An outer rim whole ring open riser and an insulating riser sleeve, inner circle allowance, and external circle chilling block chilling are adopted; and circular insulating blind risers are dispersed on an inner rim and the corresponding bottom is chilled by the chilling block correspondingly so as to obtain semi-gear ring blank. In the method for casting the super-large type semi-gear ring, the outer rim whole ring open riser and the insulating riser sleeve are adopted, so that the feeding capacity of the riser is enhanced and the tissue compactness of the prepared casting is obviously improved, simultaneously floating sand and sundries can float conveniently, and the defects of sand inclusion, air holes and inclusion are reduced; the whole ring inner allowance and sand lining chilling block chilling are adopted; the inner allowance can ensure that an outer rim wall thickness center moves inward; by sand lining chilling block chilling, the tissues of the gear surface and the gear root are densified, and the defect of magnaflux inspection is reduced; and the inner allowance is not removed during further processing, the blank gear surface quality of the semi-gear ring is guaranteed, and the gear surface magnetic powder and ultrasonic flaw detection yield is improved.
Description
Technical field
The present invention relates to the production technical field of super-huge half-ring gear, be specifically related to a kind of casting method of super-huge half-ring gear.
Background technology
The large gear circle is the crucial drive disk assembly in large-sized rotary kiln, grinding machine and building materials, mine, metallurgy, the electromechanical equipment, the quality of gear ring quality directly has influence on the stationarity of life-span, performance and the transmission of equipment, therefore, how to improve large gear circle quality and just become vital problem.Along with expanding economy and scientific and technological progress, the specification of building materials, the used large gear circle of field of metallurgy is developed into more than present diameter 10000 mm by diameter 4000-6000 mm in the world, specification is increasing, quality requirement is also more and more higher, except requiring good fatigue resistance, high strength, high tenacity, high case hardness, also require dense structure, need carry out magnetic powder inspection and ultrasonic examination, and do not allow the defectiveness soldering.
Owing to being subjected to the restriction of conditions of transportation, when Practical manufacturing large gear circle, generally be that the large gear circle is divided into two, be divided into two half-ring gears and carry out processing and manufacturing, become gear ring to use with the bolt fixed combination two half-ring gears again when to be used.The quality of half-ring gear directly affects the quality of the gear ring that is combined into, and therefore, it is particularly important that the quality of half-ring gear just seems.In manufacture process, in order to prevent the distortion of half-ring gear, usually when casting with two half-ring gear combination shapings, two half-ring gear distance of center circle pull open a little distances, the middle part adds connecting plate, forms whole circle and casts, blank being cut after casting becomes half-ring gear again.
The casting method of half-ring gear is the key technology during super-huge half-ring gear is made.Because the solidification and crystallization wide ranges of super-huge half-ring gear, its coagulating property has determined easily to produce the shrinkage cavity and porosity defective in casting process, particularly in existing casting technique, see shown in the accompanying drawing 1, rising head disperses to be placed on the stud place of inside and outside wheel rim, below the corresponding rising head in the outer rim outside, place subsidy, in the half-ring gear process, because its wheel rim mill teeth degree of depth reaches half of outer rim thickness, casting flaw often occurs at the tooth root place after the machined.In addition, because the half-ring gear diameter is large, the molten steel consumption is large, molten steel and molding sand are long time of contact in the casting process, and sand holes in the production, gas hole defect are more outstanding, often occur the magnetic particle indications that exceeds standard after the magnetic powder inspection, not only affected the quality of product, increased cost, and affect delivery date.
Summary of the invention
The object of the present invention is to provide a kind of casting method of super-huge half-ring gear.
In order to realize above purpose, the technical solution adopted in the present invention is: a kind of casting method of super-huge half-ring gear, adopt the whole circle open riser of outer rim, add insulating riser sleeve, inner circle subsidy, cylindrical iron chill shock chilling; Inner rim disperses circular insulation blind riser, and corresponding bottom iron chill shock chilling obtains the half-ring gear blank.
Further, the casting method of super-huge half-ring gear specifically may further comprise the steps:
(1) makes up mold
Make up two half-ring gears with molding sand, the center of circle of described two half-ring gears is at a distance of 400～500mm, and two half-ring gears form whole circle moulding by being arranged on two connecting plates between the half-ring gear, and described connecting plate is bolted to connection;
Outer rim top along described two half-ring gears arranges whole circle open riser, and described open riser is arranged at the top of described outer rim between two parties, and the open riser outer setting has insulating riser sleeve;
Along the inboard of described two half-ring gear outer rims and top whole circle except described bolt be used to being fixedly connected with connecting plate of being positioned at panels of plane subsidy is set; Along whole circle first Sanded chill of arranged outside of the outer rim of described two half-ring gears, the hanging sand layer thickness of described the first Sanded chill is 20mm, and the chill thickness of the first Sanded chill is 300～400mm, and the chill height is identical with half-ring gear outer rim height;
The inner rim top of described two half-ring gears and stud intersection area scattering device have circular insulation blind riser, and the quantity of circular insulation blind riser is identical with stud quantity, and described circular insulation blind riser top sets out pore; One side in the close center of circle of the inner rim of described two half-ring gears is provided with the second Sanded chill corresponding to the bottom of circular insulation blind riser, the hanging sand layer thickness of described the second Sanded chill is 10mm, the chill thickness of the second Sanded chill is 100～120mm, chill length is 150～160mm, and the chill width is 150～160mm;
(2) molten steel is poured in the mold of step (1) structure, obtains spray, cut afterwards and obtain the half-ring gear blank.
Wherein, described open riser along half-ring gear width radially is: outer rim is along radially width of half-ring gear+(100～130) mm, and the height of open riser is: outer rim height * (70～80) %.
The thickness of described interior subsidy is 60～80mm.
The diameter of described circular insulation blind riser is: inner rim is along radially width of half-ring gear+(50～80) mm.
The preparation method of described molten steel is: choose a kind of raw material as producing super-huge half-ring gear from No. 45 steel, CrMo low-alloy steel and CrNiMo low-alloy steel, these raw material adopt carbon steel, ferrochrome, ferromanganese, ferrosilicon, molybdenum-iron, ferronickel etc., calculate the outfit raw material by material chemical composition ratio requirement, adopt electric arc furnaces just to refine, and then through LF refining and VD processing, get molten steel.
The diameter of described half-ring gear blank is 9000～12000mm.
The casting method of super-huge half-ring gear provided by the invention adopts the whole circle open riser of outer rim, add insulating riser sleeve, strengthened the feeding capacity of rising head, dense structure's property of the foundry goods that makes obviously improves, also be beneficial to simultaneously floating sand and foreign material floating, reduced sand holes, pore and inclusion defect; Adopt subsidy and Sanded chill Quench in the whole circle, interior subsidy can make intracardiac moving in the outer rim wall thickness, by the Sanded chill Quench, make the flank of tooth and tooth root dense structure, reduced magnetic particle inspection defect, and interior subsidy has guaranteed the blank flank of tooth quality of half-ring gear further removing in the machined, has improved flank of tooth magnetic and ultrasonic flaw detection qualification rate.The casting method of super-huge half-ring gear provided by the invention has guaranteed the consecutive solidification of foundry goods and effective feeding of rising head, obtained without defectives such as shrinkage cavity and porosities, dense structure, after magnetic powder inspection and the ultrasonic examination, quality reaches the requirement of GB7233-87 II level, obtains need not the half-ring gear part of rewelding.
Molten steel used in the present invention is processed through advanced smelting technology, namely adopts electric arc furnaces just to refine, and then processes through LF refining and VD, has eliminated gas and the impurity in the molten steel, has improved the degree of purity of molten steel, thereby has guaranteed the quality of the half-ring gear blank that makes.
Description of drawings
Fig. 1 is existing a kind of casting technique schematic diagram;
Fig. 2 is the partial structurtes schematic diagram of a kind of mold technique of providing of the embodiment of the invention.
The specific embodiment
A kind of diameter is the casting method of the super-huge half-ring gear of 9400mm, adopts the whole circle open riser of outer rim, adds insulating riser sleeve, inner circle subsidy, cylindrical iron chill shock chilling; Inner rim disperses circular insulation blind riser, and corresponding bottom iron chill shock chilling obtains the half-ring gear blank, specifically may further comprise the steps:
(1) makes up mold
The partial structurtes schematic diagram of the mold technique that is built into is seen shown in the accompanying drawing 2, make up two half-ring gears 11 with molding sand, the center of circle of two half-ring gears 11 is at a distance of 400mm, and two half-ring gears 11 form whole circle moulding by being arranged on two connecting plates between the half-ring gear 11, and connecting plate is bolted to connection;
Whole circle arranges subsidy 8 except the bolt that is used for being fixedly connected with connecting plate along the inboard of the outer rim 9 of two half-ring gears 11 and the top that is positioned at panels of plane 6, and the thickness of interior subsidy 8 is 60mm; Hanging sand layer thickness along whole circle the first Sanded chill of arranged outside 10, the first Sanded chills 10 of the outer rim 9 of two half-ring gears 11 is 20mm, and the chill thickness of the first Sanded chill 10 is 300mm, and the chill height is highly identical with half-ring gear outer rim 9;
(2) molten steel is poured in the mold of step (1) structure, obtain spray, cut afterwards and obtain the half-ring gear blank, wherein the preparation method of molten steel is: choose steel No. 45, raw material are calculated and be equipped with to chemical composition proportioning by No. 45 steel, adopt afterwards electric arc furnaces just to refine, and then process through LF refining and VD, get molten steel.
A kind of diameter is the casting method of the super-huge half-ring gear of 10160mm, adopts the whole circle open riser of outer rim, adds insulating riser sleeve, inner circle subsidy, cylindrical iron chill shock chilling; Inner rim disperses circular insulation blind riser, and corresponding bottom iron chill shock chilling obtains the half-ring gear blank, specifically may further comprise the steps:
(1) makes up mold
The partial structurtes schematic diagram of the mold technique that is built into is seen shown in the accompanying drawing 2, make up two half-ring gears 11 with molding sand, the center of circle of two half-ring gears 11 is at a distance of 450mm, and two half-ring gears 11 form whole circle moulding by being arranged on two connecting plates between the half-ring gear 11, and connecting plate is bolted to connection;
Whole circle arranges subsidy 8 except the bolt that is used for being fixedly connected with connecting plate along the inboard of the outer rim 9 of two half-ring gears 11 and the top that is positioned at panels of plane 6, and the thickness of interior subsidy 8 is 70mm; Hanging sand layer thickness along whole circle the first Sanded chill of arranged outside 10, the first Sanded chills 10 of the outer rim 9 of two half-ring gears 11 is 20mm, and the chill thickness of the first Sanded chill 10 is 350mm, and the chill height is highly identical with half-ring gear outer rim 9;
(2) molten steel is poured in the mold of step (1) structure, obtain spray, cut afterwards and obtain the half-ring gear blank, wherein the preparation method of molten steel is: choose the CrMo steel, raw material are calculated and be equipped with to chemical composition proportioning by the 20CrMo steel, adopt afterwards electric arc furnaces just to refine, and then process through LF refining and VD, get molten steel.
A kind of diameter is the casting method of the super-huge half-ring gear of 11630mm, adopts the whole circle open riser of outer rim, adds insulating riser sleeve, inner circle subsidy, cylindrical iron chill shock chilling; Inner rim disperses circular insulation blind riser, and corresponding bottom iron chill shock chilling obtains the half-ring gear blank, specifically may further comprise the steps:
(1) makes up mold
The partial structurtes schematic diagram of the mold technique that is built into is seen shown in the accompanying drawing 2, make up two half-ring gears 11 with molding sand, the center of circle of two half-ring gears 11 is at a distance of 500mm, and two half-ring gears 11 form whole circle moulding by being arranged on two connecting plates between the half-ring gear 11, and connecting plate is bolted to connection;
Whole circle arranges subsidy 8 except the bolt that is used for being fixedly connected with connecting plate along the inboard of the outer rim 9 of two half-ring gears 11 and the top that is positioned at panels of plane 6, and the thickness of interior subsidy 8 is 80mm; Hanging sand layer thickness along whole circle the first Sanded chill of arranged outside 10, the first Sanded chills 10 of the outer rim 9 of two half-ring gears 11 is 20mm, and the chill thickness of the first Sanded chill 10 is 400mm, and the chill height is highly identical with half-ring gear outer rim 9;
(2) molten steel is poured in the mold of step (1) structure, obtain spray, cut afterwards and obtain the half-ring gear blank, wherein the preparation method of molten steel is: choose the CrNiMo steel, raw material are calculated and be equipped with to chemical composition proportioning by the 20CrNiMo steel, adopt afterwards electric arc furnaces just to refine, and then process through LF refining and VD, get molten steel.
Three super-huge half-ring gears that embodiment 1-embodiment 3 is obtained carry out ultrasonic examination and magnetic powder inspection detection, and quality reaches the requirement of GB7233-87 II level, and dense structure, without defectives such as shrinkage cavity and porosities, need not rewelding.
Claims (6)
1. the casting method of a super-huge half-ring gear is characterized in that: adopt the whole circle open riser of outer rim, add insulating riser sleeve, inner circle subsidy, cylindrical iron chill shock chilling; Inner rim disperses circular insulation blind riser, and corresponding bottom iron chill shock chilling obtains the half-ring gear blank, and the diameter of described half-ring gear blank is 9000～12000mm.
2. the casting method of super-huge half-ring gear according to claim 1 is characterized in that: specifically may further comprise the steps:
(1) makes up mold
Make up two half-ring gears with molding sand, the center of circle of described two half-ring gears is at a distance of 400～500mm, and two half-ring gears form whole circle moulding by being arranged on two connecting plates between the half-ring gear, and described connecting plate is bolted to connection;
Outer rim top along described two half-ring gears arranges whole circle open riser, and described open riser is arranged at the top of described outer rim between two parties, and the open riser outer setting has insulating riser sleeve;
Along the inboard of described two half-ring gear outer rims and top whole circle except described bolt be used to being fixedly connected with connecting plate of being positioned at panels of plane subsidy is set; Along whole circle first Sanded chill of arranged outside of the outer rim of described two half-ring gears, the hanging sand layer thickness of described the first Sanded chill is 20mm, and the chill thickness of the first Sanded chill is 300～400mm, and the chill height is identical with half-ring gear outer rim height;
The inner rim top of described two half-ring gears and stud intersection area scattering device have circular insulation blind riser, and the quantity of circular insulation blind riser is identical with stud quantity, and described circular insulation blind riser top sets out pore; One side in the close center of circle of the inner rim of described two half-ring gears is provided with the second Sanded chill corresponding to the bottom of circular insulation blind riser, the hanging sand layer thickness of described the second Sanded chill is 10mm, the chill thickness of the second Sanded chill is 100～120mm, chill length is 150～160mm, and the chill width is 150～160mm;
(2) molten steel is poured in the mold of step (1) structure, obtains spray, cut afterwards and obtain the half-ring gear blank.
3. the casting method of super-huge half-ring gear according to claim 2, it is characterized in that: described open riser along half-ring gear width radially is: outer rim is along radially width of half-ring gear+(100～130) mm, and the height of open riser is: outer rim height * (70～80) %.
4. the casting method of super-huge half-ring gear according to claim 2, it is characterized in that: the thickness of described interior subsidy is 60～80mm.
5. the casting method of super-huge half-ring gear according to claim 2, it is characterized in that: the diameter of described circular insulation blind riser is: inner rim is along radially width of half-ring gear+(50～80) mm.
6. the casting method of super-huge half-ring gear according to claim 2, it is characterized in that: the preparation method of described molten steel is: choose a kind of in No. 45 steel, CrMo low-alloy steel and the CrNiMo low-alloy steel and be raw material, adopt electric arc furnaces just to refine, and then process through LF refining and VD, get molten steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110124006 CN102205397B (en) | 2011-05-14 | 2011-05-14 | Method for casting super-large type semi-gear ring |
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| CN 201110124006 CN102205397B (en) | 2011-05-14 | 2011-05-14 | Method for casting super-large type semi-gear ring |
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| CN102205397B true CN102205397B (en) | 2013-01-02 |
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| CN 201110124006 Expired - Fee Related CN102205397B (en) | 2011-05-14 | 2011-05-14 | Method for casting super-large type semi-gear ring |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102441646A (en) * | 2011-12-08 | 2012-05-09 | 济南重工股份有限公司 | Apparatus and method for casting large-scale semi-gear |
| CN103239811B (en) * | 2012-02-10 | 2016-04-06 | 东莞市红火安全科技有限公司 | Constant speed type descending lifeline |
| CN103447464A (en) * | 2012-05-31 | 2013-12-18 | 洛阳洛北重工机械有限公司 | Process for preventing deformation of wheel disk of semi-gear rim |
| CN104014745B (en) * | 2014-06-18 | 2016-05-18 | 唐山东方华盛优耐高科股份有限公司 | The long barrier part feeding technology of large cast steel method |
| CN104827000B (en) * | 2015-05-22 | 2017-05-31 | 四川南车共享铸造有限公司 | A kind of casting method of gear ring |
| CN104972069B (en) * | 2015-07-23 | 2017-03-15 | 乐山天华机械制造有限公司 | A kind of labyrinth casing casting mould |
| CN106541085A (en) * | 2017-01-23 | 2017-03-29 | 重庆通耀铸锻有限公司 | Coupler body casting system |
| CN108097882A (en) * | 2017-12-26 | 2018-06-01 | 无锡市蠡湖铸业有限公司 | Riser component |
| CN110090916A (en) * | 2018-01-31 | 2019-08-06 | 中国科学院金属研究所 | The control method of surface defect during one seed nucleus main pump shell cast |
| CN110842150B (en) * | 2019-12-05 | 2021-11-19 | 中铁山桥集团有限公司 | Assembled frog casting system and method |
| CN111761025B (en) * | 2020-05-26 | 2022-07-12 | 洛阳中重铸锻有限责任公司 | Anti-deformation casting method for thin-wall curved-surface steel casting |
| CN112247068A (en) * | 2020-08-25 | 2021-01-22 | 常熟市虹桥铸钢有限公司 | Casting method of upper casting of gearless electric propeller hull |
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| CN101069918A (en) * | 2007-04-30 | 2007-11-14 | 广东省韶铸集团有限公司 | Casting technology of casted-steel gear |
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Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54104443A (en) * | 1978-02-06 | 1979-08-16 | Hitachi Metals Ltd | Casting method differential gear case |
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2011
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101069918A (en) * | 2007-04-30 | 2007-11-14 | 广东省韶铸集团有限公司 | Casting technology of casted-steel gear |
| CN101422816A (en) * | 2007-11-02 | 2009-05-06 | 中信重工机械股份有限公司 | Exposed gear casting no-choke riser-head technique design |
Non-Patent Citations (2)
| Title |
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| JP昭54-104443A 1979.08.16 |
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